A one-piece silicone cup that suctions on and quietly collects the milk you'd otherwise lose during a feed, for the price of a couple of lattes.
Every nursing parent should own a Haakaa, because catching your letdown on the opposite side while baby feeds adds up to a surprising freezer stash with zero effort. It's a single piece of food-grade silicone, so there's nothing to break, no batteries, and cleanup is a rinse. Understand what it is, though: it's a passive suction catcher and gentle manual pump, not a replacement for an electric pump if you're pumping to build or maintain a supply. Skip it as your only pump if you're exclusively pumping or heading back to work. Use a stable base or tip-proof version, since a knocked-over full Haakaa is a heartbreak every parent remembers.